Spindle swivel feeding device of ultra-fine electric spark machining tool

Abstract

The invention relates to a spindle swivel feeding device of an ultra-fine electric spark machining tool, which is characterized in that a spindle and a direct-current motor are installed on a bracket, the upper end of the spindle and the power output end of the direct-current motor can respectively form a spindle end and a motor shaft end, the spindle end and the motor shaft end are connected by a driving belt, two sides of the spindle end are respectively provided with a conductive block, brush assemblies are installed inside the conductive blocks, and the conductive blocks are installed on the bracket. A connecting bottom board is arranged on the bracket, the upper part of the spindle and the direct-current motor are installed on the bracket through the connecting bottom board, the brush assemblies are installed inside the conductive blocks through countersunk plug screws, the spindle and the spindle end are fixed through spindle head internal fastening screws, and the motor shaft end and the direct-current motor are fixedly connected through internal fastening screws. The invention can effectively solve the problem of electrode loss, and can improve the machining precision and the surface quality of micropores.

Description

technical field [0001] The invention relates to a spindle rotary feeding device of an ultra-fine electrical discharge machining machine tool, in particular to a device for ultra-fine electrical discharge machining machine tools used for machining micro-holes, and belongs to the technical field of mechanical processing. Background technique [0002] The principle of EDM is based on the electro-corrosion phenomenon during the pulsed spark discharge between the tool and the workpiece (positive and negative electrodes) to remove excess metal to achieve the predetermined processing requirements for the size, shape and surface quality of the parts. [0003] EDM is mainly used to process molds and parts with complex-shaped holes and cavities; process various hard and brittle materials, such as cemented carbide and hardened steel; process deep fine holes, special-shaped holes, deep grooves, and narrow seams and cut thin slices etc. Micro-holes are mainly used in the processing of f...

AI Technical Summary

Problems solved by technology

[0004] The discharge pulse energy and discharge gap required by micro-EDM are very small. As the depth of micro-hole machining increases, the flow of working fluid between electrodes becomes more and more difficult. Therefore, the electro-erosion products are not easy to be discharged from the processing area, and short circuits and arcs are prone to occur. Discharge, processing stability and processing accuracy will be reduced

When the concentration of electro-corrosion products in the discharge gap reaches a critical value, arc discharge will also be generated between the workpiece and the tool electrode through the working fluid, which will cause loss to both the cathode and the anode

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